Preheat oven to 350F. Saute onion with olive oil in a small saute pan and set aside to cool. Mix ground beef, egg, onion, and Burger Blend spice and form 1 inch meatballs on sheetpan. Bake for 10 minutes or until meatballs are slightly browned. Mix together barbecue sauce and pepper jelly in a saucepan and begin to simmer. Add meatballs to sauce and continue to simmer for 15 minutes.